Ancient Greece. Istros, Moesia. AR Trihemiobol, 1/4 Drachm. 4th BC. 11mm, 0.93g.
 
Obv: Facing male heads, the right inverted. Rev: ΙΣΤΡΙΗ, sea eagle left, grasping dolphin with talons.
 
A well struck and centred coin, an attractive old grey collection tone.